Patch for review -- sleep() and nanosleep() return incorrect values when interrupted by a signal [format resend]

[Dan Jakubiec]

[Resending with better plain/text formatting.  My apologies.]
Currently, if nanosleep() is interrupted by a POSIX signal it returns 
0.  According to POSIX:

If the /nanosleep/() function returns because it has been interrupted by 
a signal, it shall return a value of -1 and set /errno/ to indicate the 
interruption.

This in turns fixes the return value for sleep().  Per POSIX:

If /sleep/() returns due to delivery of a signal, the return value shall 
be the "unslept" amount (the requested time minus the time actually 
slept) in seconds.

sleep() relies on nanosleep() in order to return the proper value for 
remaining seconds.  Presently, sleep() returns 0 when interrupted.

--
Dan Jakubiec
Systech Corporation

Index: ecos/packages/compat/posix/current/ChangeLog
===================================================================
RCS file: /cvs/ecos/ecos/packages/compat/posix/current/ChangeLog,v
retrieving revision 1.50
diff -u -5 -p -r1.50 ChangeLog
--- ecos/packages/compat/posix/current/ChangeLog        12 Jun 2006 15:43:16 
-0000      1.50
+++ ecos/packages/compat/posix/current/ChangeLog        13 Jun 2006 03:34:42 
-0000
@@ -1,5 +1,11 @@
+2006-06-13  Dan Jakubiec  <[EMAIL PROTECTED]>
+
+       * src/time.cxx: Fixed nanosleep() to return EINTR when it is interrupted
+       by a signal.  This in turn fixed sleep() to return the number of 
unelapsed
+       seconds when interrupted by a signal.
+
 2006-06-12  Klaas Gadeyne  <[EMAIL PROTECTED]>
 
        * src/pthread.cxx (pthread_create): name is only defined if
        CYGVAR_KERNEL_THREADS_NAME is set to 1
 
Index: ecos/packages/compat/posix/current/src/time.cxx
===================================================================
RCS file: /cvs/ecos/ecos/packages/compat/posix/current/src/time.cxx,v
retrieving revision 1.10
diff -u -5 -p -r1.10 time.cxx
--- ecos/packages/compat/posix/current/src/time.cxx     23 Oct 2005 20:44:36 
-0000      1.10
+++ ecos/packages/compat/posix/current/src/time.cxx     13 Jun 2006 03:34:42 
-0000
@@ -663,10 +663,14 @@ externC int nanosleep( const struct time
 
         // Calculate remaining number of ticks.
         ticks -= (now-then);
 
         cyg_ticks_to_timespec( ticks, rmtp );
+
+        // Check for cancellation and then notify the caller that we were 
interrupted.
+        PTHREAD_TESTCANCEL();
+        TIME_RETURN(EINTR);
     }
     
     // check if we were woken up because we were cancelled.
     PTHREAD_TESTCANCEL();